IPC Unit 5 Review- Properties of Matter

A balloon is inflated with room temperature air and is placed outside in the sun. The balloon expands due to the rise in temperature. Which of the following describes what happens to the molecules of air as the temperature rises?

• The molecules of air stop colliding with the balloon wall.

• The molecules of air move more quickly.

• The molecules of air increase in size.

• There are fewer interactions between the air molecules.

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Most substances are more dense in their solid form than in their liquid or gaseous form. What makes the solid phase more dense?

• The solid form has more energy, so the molecules are packed more tightly.

• The solid form has more mass, so the molecules are packed more tightly.

• The solid form has less energy, so the molecules are packed more tightly.

• The solid form has less mass, so the molecules are packed more tightly.

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Compared to the particles in a gas, the particles in a solid move —

• at the same speed as the gas.

• slower than the gas.

• quicker and farther than the gas.

• quicker than the gas.

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Which one of the following is a true statement?

• Liquids do not change shape easily.

• Gas molecules move more slowly as they are heated.

• Gas molecules move around freely.

• Solids change shape easily.

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Which type of substance with a definite volume has the highest amount of particle motion?

• Solid

• Liquid

• Gas

• Plasma

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Water is often called the "universal solvent" due to its ability to dissolve many substances. Why is water able to dissolve ionic substances?

• The shape of the water molecule is triangular, which helps the water molecule physically break apart ionic bonds.

• The water molecule has three atoms, which causes positive ions to be magnetically attracted to the largest atom.

• The water molecule is made of hydrogen and oxygen, which cause instability in ionic molecules.

• The water molecule is polar, which causes positive ions to be attracted to one end of the molecule and negative ions to be attracted to the opposite end.

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Which of the following best explains why the noble gases are less likely to chemically bond with other elements?

• They are all non-metals.

• They are all rare elements.

• They all have a full outer shell of electrons.

• They have the highest atomic number in the row.

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Atom A has 4 Valence Electrons while Atom B has 1 Valence Electron. Which statement accurately represents these atoms?

• Atom A and B are isotopes of the same element.

• Atom A and B belong to the same group in the periodic table.

• Atom A is more reactive than Atom B.

• Atom B is more reactive than Atom A.

Which of the following is one way to witness a chemical property?

• Heat a substance to its boiling point.

• Examine a substance under a microscope.

• Pass an electrical current through the substance.

• Observe how the substance reacts with another substance.

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What is the density of 18 milliliters of a liquid substance with a mass of 6.05 grams at 15°C?

• 0.336 g/mL

• 2.98 g/mL

• 11.95 g/mL

• 34.05 g/mL